Section 6

26-174 units/L: Enzyme in cardiac/skel/brain muscle that is released by injury

CKMB

0-5% of total CK value: ↑4-6 hr after cardiac damage

LDH (5 fractionates)

140-280 units/L: Enzyme in the cells of many body tissues released during injury, so not a specific indicator of disease of any one organ.

Myoglobin

<90 mcg/L (normal): Oxygen binding protein found in cardiac and skeletal muscle.↑ 3 hrs after cardiac injury or death. More sensitive than CPK but dz/injury of the skeletal muscles can also cause elevation.